Randgold Resources ( GOLD) is engaged in gold mining, exploration and related activities. Yesterday's Volume: 1,328,600 Average Volume: 787,341 Volume % Change: 60% This gold mining stock jumped sharply Tuesday after Investec Securities upgraded the stock to a buy from hold rating. The firm told clients to use any declines in share prices as a buying opportunity. Market players should now watch for a sustained move and close above its 50-day moving average $106.34 on volume that's close to or well above its three-month average action of 787,341 shares. If we get that action soon, then look for this stock to continue to trend higher back toward $110. Rangold shows up on a recent list of Hedge Funds' Best Picks for 2012.